diff options
Diffstat (limited to 'src/sndobj/rfftw/fhf_4.c')
| -rw-r--r-- | src/sndobj/rfftw/fhf_4.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/src/sndobj/rfftw/fhf_4.c b/src/sndobj/rfftw/fhf_4.c new file mode 100644 index 0000000..cc1a8ae --- /dev/null +++ b/src/sndobj/rfftw/fhf_4.c @@ -0,0 +1,185 @@ +/*
+ * Copyright (c) 1997-1999 Massachusetts Institute of Technology
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+/* This file was automatically generated --- DO NOT EDIT */
+/* Generated on Sun Nov 7 20:44:43 EST 1999 */
+
+#include <fftw-int.h>
+#include <fftw.h>
+
+/* Generated by: ./genfft -magic-alignment-check -magic-twiddle-load-all -magic-variables 4 -magic-loopi -hc2hc-forward 4 */
+
+/*
+ * This function contains 34 FP additions, 14 FP multiplications,
+ * (or, 28 additions, 8 multiplications, 6 fused multiply/add),
+ * 15 stack variables, and 32 memory accesses
+ */
+static const fftw_real K707106781 = FFTW_KONST(+0.707106781186547524400844362104849039284835938);
+
+/*
+ * Generator Id's :
+ * $Id: fhf_4.c,v 1.1.1.1 2006/05/12 15:14:48 veplaini Exp $
+ * $Id: fhf_4.c,v 1.1.1.1 2006/05/12 15:14:48 veplaini Exp $
+ * $Id: fhf_4.c,v 1.1.1.1 2006/05/12 15:14:48 veplaini Exp $
+ */
+
+void fftw_hc2hc_forward_4(fftw_real *A, const fftw_complex *W, int iostride, int m, int dist)
+{
+ int i;
+ fftw_real *X;
+ fftw_real *Y;
+ X = A;
+ Y = A + (4 * iostride);
+ {
+ fftw_real tmp35;
+ fftw_real tmp36;
+ fftw_real tmp37;
+ fftw_real tmp38;
+ fftw_real tmp39;
+ fftw_real tmp40;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp35 = X[0];
+ tmp36 = X[2 * iostride];
+ tmp37 = tmp35 + tmp36;
+ tmp38 = X[iostride];
+ tmp39 = X[3 * iostride];
+ tmp40 = tmp38 + tmp39;
+ X[iostride] = tmp35 - tmp36;
+ Y[-iostride] = -(tmp38 - tmp39);
+ X[2 * iostride] = tmp37 - tmp40;
+ X[0] = tmp37 + tmp40;
+ }
+ X = X + dist;
+ Y = Y - dist;
+ for (i = 2; i < m; i = i + 2, X = X + dist, Y = Y - dist, W = W + 3) {
+ fftw_real tmp7;
+ fftw_real tmp30;
+ fftw_real tmp12;
+ fftw_real tmp29;
+ fftw_real tmp18;
+ fftw_real tmp26;
+ fftw_real tmp23;
+ fftw_real tmp27;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp7 = X[0];
+ tmp30 = Y[-3 * iostride];
+ {
+ fftw_real tmp9;
+ fftw_real tmp11;
+ fftw_real tmp8;
+ fftw_real tmp10;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp9 = X[2 * iostride];
+ tmp11 = Y[-iostride];
+ tmp8 = c_re(W[1]);
+ tmp10 = c_im(W[1]);
+ tmp12 = (tmp8 * tmp9) - (tmp10 * tmp11);
+ tmp29 = (tmp10 * tmp9) + (tmp8 * tmp11);
+ }
+ {
+ fftw_real tmp15;
+ fftw_real tmp17;
+ fftw_real tmp14;
+ fftw_real tmp16;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp15 = X[iostride];
+ tmp17 = Y[-2 * iostride];
+ tmp14 = c_re(W[0]);
+ tmp16 = c_im(W[0]);
+ tmp18 = (tmp14 * tmp15) - (tmp16 * tmp17);
+ tmp26 = (tmp16 * tmp15) + (tmp14 * tmp17);
+ }
+ {
+ fftw_real tmp20;
+ fftw_real tmp22;
+ fftw_real tmp19;
+ fftw_real tmp21;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp20 = X[3 * iostride];
+ tmp22 = Y[0];
+ tmp19 = c_re(W[2]);
+ tmp21 = c_im(W[2]);
+ tmp23 = (tmp19 * tmp20) - (tmp21 * tmp22);
+ tmp27 = (tmp21 * tmp20) + (tmp19 * tmp22);
+ }
+ {
+ fftw_real tmp13;
+ fftw_real tmp24;
+ fftw_real tmp33;
+ fftw_real tmp34;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp13 = tmp7 + tmp12;
+ tmp24 = tmp18 + tmp23;
+ Y[-2 * iostride] = tmp13 - tmp24;
+ X[0] = tmp13 + tmp24;
+ tmp33 = tmp18 - tmp23;
+ tmp34 = tmp30 - tmp29;
+ X[3 * iostride] = -(tmp33 + tmp34);
+ Y[-iostride] = tmp34 - tmp33;
+ }
+ {
+ fftw_real tmp31;
+ fftw_real tmp32;
+ fftw_real tmp25;
+ fftw_real tmp28;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp31 = tmp29 + tmp30;
+ tmp32 = tmp26 + tmp27;
+ X[2 * iostride] = -(tmp31 - tmp32);
+ Y[0] = tmp32 + tmp31;
+ tmp25 = tmp7 - tmp12;
+ tmp28 = tmp26 - tmp27;
+ Y[-3 * iostride] = tmp25 - tmp28;
+ X[iostride] = tmp25 + tmp28;
+ }
+ }
+ if (i == m) {
+ fftw_real tmp1;
+ fftw_real tmp6;
+ fftw_real tmp4;
+ fftw_real tmp5;
+ fftw_real tmp2;
+ fftw_real tmp3;
+ ASSERT_ALIGNED_DOUBLE;
+ tmp1 = X[0];
+ tmp6 = X[2 * iostride];
+ tmp2 = X[iostride];
+ tmp3 = X[3 * iostride];
+ tmp4 = K707106781 * (tmp2 - tmp3);
+ tmp5 = K707106781 * (tmp2 + tmp3);
+ X[iostride] = tmp1 - tmp4;
+ X[0] = tmp1 + tmp4;
+ Y[0] = -(tmp5 + tmp6);
+ Y[-iostride] = tmp6 - tmp5;
+ }
+}
+
+static const int twiddle_order[] =
+{1, 2, 3};
+fftw_codelet_desc fftw_hc2hc_forward_4_desc =
+{
+ "fftw_hc2hc_forward_4",
+ (void (*)()) fftw_hc2hc_forward_4,
+ 4,
+ FFTW_FORWARD,
+ FFTW_HC2HC,
+ 91,
+ 3,
+ twiddle_order,
+};
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